I saw one of these many years ago. A Cord Westchester with a 1953 Cadillac drivetrain installed. It was fit in the original Cord frame, the floor board was cut out to fit the hydramatic transmission. I don't know what they used for motor mounts. The one I saw was done very crudely and was never completely finished. Most of the conversions were done in the 1950's as "backyard jobs" and that was before people started swapping out stub frames, ect, which is a complicated process.